Update; add headers to py files

weather/weather.py

@@ -1,3 +1,13 @@
+# weather.py
+# ------------
+# By MWC Contributors
+#
+# Defines `print_weather`, which does all the work of fetching 
+# the requested weather data and printing it out to the screen
+# in a sensible way. 
+# 
+# It's your job to implement this function.
+
 from weather.weather_apis import (
     geocode_location,
     estimate_location,